Matters astrological are increasingly present in everyday life. Several discoveries are frequently made. Not long ago, astronomers from McGill University in Canada and the Indian Institute of Science (IISc) used data from a Telescope to detect a radio signal originating from the hydrogen atomic bomb of a galaxy far, far away. Learn more about this discovery.
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According to research, the discovery was recently published in the Monthly Notices of the Royal Astronomical Society. Astronomers said this was the first detection of a galaxy's 21 cm strong emission lens.
The data came from the GMRT, Arnab Chakraborty, who detected a radio signal from atomic hydrogen in a distant galaxy at redshift z = 1.29.
But not everything was as easy as it seems. As Chakraborty reported, thanks to the immense distance of the galaxy, there was a change in the emission line from 21 cm to 48 cm. This all occurred at the exact moment the signal traveled from the source to the telescope.
How was it possible to perform this signal detection?
Astronomers explain that this detection was possible due to a phenomenon called lens. gravity, and it occurs when the light emitted by the source is bent due to the presence of another massive body.
They used an elliptical galaxy of the initial type as an example and also said that between the galaxy and the target observer there is effectively a signal amplification.
And how was the signal amplification in this case?
Well, in this particular situation, the signal magnification was about a factor of 30, so it was possible to see through the high redshift universe. Another observation made was that its atomic mass is twice that of the star.
Through these results, there was then the possibility of thinking about the feasibility of observing atomic gas from galaxies at cosmological distances with similar lens systems.
Furthermore, new possibilities arise for probing the cosmic evolution of neutral gas with existing low-frequency radio telescopes.